In recent months the next version of Moodle has been beta released to the general public on the Moodle website. Moodle is an open source product and a new update to the currently 1.0 is always available. There is almost a weekly update that a school can implement with a new feature.
A team who run the Moodle website have been working on the new 2.0 version of the product. This is currently in Release Candidate 1 and does not have all the features for back end services. One of these is the ability to use a Microsoft SQL Server.
Since April 2010 I have released 3 different whitepapers on how to implement Moodle on Windows Server 2008 both x86 and x64 and also building a high availability Moodle install on a Windows environment.
Now a release of Moodle 2 is available, I have write a step by step guide on how to implement Moodle 2 on a Windows Server 2008 R2, IIS, PHP, MySQL.
You can download it from here.